Shock absorbing seat structure for tractors



SHOCK ABSORBING SEAT STRUCTURE FOR TRACTORS Filed Nav. 29, 1944 2sheets-sheet 1 Homey:

Oct. 26, v ZAHLLER SHOCK ABSORBING `SEAT STRUCTURE FOR TRACTORS FiledNov. 29. 1944 2 Sheets-Sheet 2 Patented O ct. 26, 1948 rorrica SHOCKABSORBING SEAT STRUCTURE FR. TRACTORS Virgil Zahller, Belle Center,Dhio, assignor to Isaac J Fickel. Belle Center, Ohio ApplicationNovember 29, 1944, Serial No. 565,679

(Cl. 15S-51) 1 Claim. l

The present invention relates to new and useful improvements in seatstructures for tractors and has for its primary object to provide meansfor eliminating shock and other sudden movement of the tractor to theseat, such aS may be caused by the tractor travelling over roughsurfaces.

A further object of the invention is to provide a hydraulic shockabsorbing seat structure by means of which sudden raising movement ofthe seat is eliminated.

A still further object is to provide a structure of this character ofsimple and practical construction, which is eilicient and reliable inperfomance. relatively inexpensive to manufacture and install inposition on a conventional farm tractor and which otherwise is welladapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming part hereof, wherein likenumerals refer to like parts throughout, and in which:

Figure 1 is a, side elevational view of a tractor seat equipped with myinvention and with parts broken away and shown in section.

Figure 2 is a similar view showing the seat in its lower position.

Figure 3 is a rear elevational view.

Figure 4 is a top plan view of the support for the shock absorber andwith parts shown in sec tion, and

Figure 5 is a sectional view taken substantially v 2 channel member l2extending rearwardly and upwardly above the channel support 8, the rearend of the channel member l2 being bent to extend substantiallyhorizontally as shown at I3 and positioned under a seat it and suitablysecured thereto, such as by Welding or the like.

The channel member l2 is formed with a plurality of longitudinallyspaced openings i5 adapted for selectively receiving a stud i6projecting from a ball l1 positioned under the member i2 and securedthereto by a nut I8.

The ball il is engaged within and gripped by the'upper coil of a coilspring i9 which has its lowermost coil similarly engaging a ball 2tformed on a plate 2i resting on top of the channel support 8. Thechannel support t is formed with a longitudinally extending slot 22adapted for receiving a bolt 23 carried by the plate 2l for securing theplate in longitudinally adjustedposition on the channel support t. Toone side o f the channel support 8, adjacent its rear end, is attached ahydraulic shock absorber housing 2d of conventional construction havinga movable arm 25 extending rearwardly therefrom and piv- 25 otallyattached at its outer end to the lower end tractor having a stud 6rising therefromythe stud channel support 8, the posts IB thus beingsupported in upright spaced relation and are prol vided at their upperends with a pin i i.

Positioned between the posts i0 and pivoted on the pin Il is an invertedchannel member l2, the

of a link 26, the link extending upwardly and pivotally attached at itsupper end to the horizontal portion i3 of the arm l2 by means of a pin2li with spacing blocks 2l thereon in said portion and upon oppositesides of said link 2E.

In the operation of the device and under normal operating conditionsythe seat It will occupy a position as shown in Figure 1 of the drawingsand when the tractor encounters irregularities in the surface of theground causing an upward movement of the rear end of the tractor thespring i9 will becomecompressed and the arm 25 of the hydraulic shockabsorber will be lowered as shown in Figure 2 of the drawings, thuspreventing transmission of the movement of the tractor to the seat. Thespring i9 will then have a tendency to expand and raise the seat I t andany sudden raising movement is retarded by the action of the shockabsorber, thus eliminating the transmission of shock to the driver ofthe tractor.

It is believed that the details of construction and manner of use of thedevice will be readily understood from the foregoing without furtherdetailed explanation.

Having thus described the invention. what I claim is:

A tractor seat structure for attachment to the axle housing of thetractor comprising an elongated supporting bar, means for attaching saidbar at one end thereof to said housing to extend 3 horizontallyrearwardly therefrom, a pair of laterally spaced posts arising from saidend of said bar, an arm pivoted at one end between said posts to extendrearwardly of said housing along said bar and swing vertically, a seatsupported by the other end of said arm, hydraulic shock absorbing meanson the other end of said bar including a vertically swingable crank, alink having the ends thereof pivoted to said crank and to said other endof said arm, and an expansion coil spring interposed between said barand arm intermediate the ends thereof and having its ends connected tosaid bar and arm for adjustment along the same.

VIRGIL ZAHLLER.

REFERENCES CITED The following references are of record in the file ofthis patent:

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